Moderator Chris Wallace asked Cruz to discuss how his plan
to defeat ISIS was different than other presidential candidates'
plans.

The senator used his answer to sneak in a jab at Trump, even
while he complained that the moderators were asking him
unfair questions.

"Gosh, if you guys ask me one more mean question, I may have
to leave the stage," Cruz quipped as the audience laughed.

This wasn't the first time that Cruz made a joke out of Trump's
decision to boycott the debate over perceived unfair treatment by
the network and one of the debate's moderators, Megyn Kelly.

Earlier in the evening, Cruz responded to a question about
Trump's boycott by channeling the real-estate
magnate himself during the debate.

"Let me say that I'm a maniac and everyone on this stage is
stupid fat and ugly, and Ben, you're a terrible surgeon," Cruz
said, referring to retired neurosurgeon Ben Carson.

He continued:

Now that we've got the Donald Trump portion out of the way, I
want to thank everyone here for showing the men and women of Iowa
the respect to show up and make the case to the people of this
state why each of us would make the best commander in chief.

At least one presidential candidate promised that they
wouldn't leave the debate in protest.